Public Switched Telephone Network

Attempting to understand how the telephone used to work. --DarrinEden


FXO - Foreign Exchange Office. An interface that connects to the Public Switched Telephone Network's (PSTN) central office and is the interface offered on a standard telephone. Example: RJ-11 connector that allows analog connection to the central office.

FXS - Foreign Exchange Subscriber. An interface that connects directly to a standard telephone and supplies ring, voltage, and dial tone. Example: RJ-11 connector allows connections to basic telephone equipment.

PSTN (last edited 2007-11-23 18:01:12 by localhost)